What's the point of the green button (overwriting data with random garbage), if you can have an encrypted drive, which means you have random garbage on it all the time, lest you have the key. Well, maybe that's how it works (erasing the encryption key), though in this case there is no point of doing it remotely.
In this case the red button is not that important either. The only thing they could be used is when you are tortured to give away the decryption key (or passphrase) for the drive. By pressing the red button, you could convince the bad guys, that they won't be able to read the data anyway. The green button would not save your arse, since they may just think that you gave them the wrong key.
Comments
What's the point of the green button (overwriting data with random garbage), if you can have an encrypted drive, which means you have random garbage on it all the time, lest you have the key. Well, maybe that's how it works (erasing the encryption key), though in this case there is no point of doing it remotely.
In this case the red button is not that important either. The only thing they could be used is when you are tortured to give away the decryption key (or passphrase) for the drive. By pressing the red button, you could convince the bad guys, that they won't be able to read the data anyway. The green button would not save your arse, since they may just think that you gave them the wrong key.
The green button provides security even if your encryption key has been compromised.